diff --git a/python/ql/src/Security/CWE-020-ExternalAPIs/ExternalAPIs.qll b/python/ql/src/Security/CWE-020-ExternalAPIs/ExternalAPIs.qll
index da52edd6af1..b3482012e9a 100644
--- a/python/ql/src/Security/CWE-020-ExternalAPIs/ExternalAPIs.qll
+++ b/python/ql/src/Security/CWE-020-ExternalAPIs/ExternalAPIs.qll
@@ -41,6 +41,7 @@ private import semmle.python.objects.ObjectInternal
  * A callable that is considered a "safe" external API from a security perspective.
  */
 class SafeExternalAPI extends Unit {
+  /** Gets a callable that is considered a "safe" external API from a security perspective. */
   abstract DataFlowPrivate::DataFlowCallable getSafeCallable();
 }